Robin Williams’ Death: Cause, Autopsy, and Final Moments

Robin Williams brought laughter to millions, so the news of his death on August 11, 2014, felt almost impossible to process. The official cause was asphyxia due to hanging, but months later a postmortem diagnosis of widespread Lewy body dementia reshaped how the world understood his final struggles.

Date of Death: August 11, 2014 ·
Age at Death: 63 years ·
Cause of Death: Asphyxia due to hanging ·
Primary Contributing Factor: Lewy body dementia (autopsy finding) ·
Previous Diagnosis: Parkinson’s disease (misdiagnosis) ·
Place of Death: Tiburon, California, USA

Key facts, one pattern: the known details are precise, but the personal ones remain private.

What was the cause of Robin Williams’ death?

Official autopsy findings

The Marin County Coroner’s Office ruled that Robin Williams died by suicide on August 11, 2014, at the age of 63. The cause was asphyxia due to hanging, a finding confirmed by a full autopsy (ABC News (established news outlet)). The official report was released several months later, in November 2014 (ABC News). No suicide note was found at the scene, according to authorities.

The role of Lewy body dementia

The most striking finding from the autopsy was not the cause of death itself, but the condition discovered in Williams’s brain. Pathologists identified diffuse Lewy body dementia (NeurologyAdvisor (neurology professional site)), a severe form of a neurodegenerative disorder. This was a surprise because Williams had publicly been treated for Parkinson’s disease (STAT (health news publication)). The autopsy showed Lewy bodies spread throughout many brain regions, far more extensive than typical for Parkinson’s alone (ABC News (widow interview)). The Lewy Body Dementia Resource Center later described Williams’s case as one of the most severe LBD cases pathologists had seen (Lewy Body Dementia Resource Center (LBD education org)).

The implication: what the public saw as depression and a sudden suicide was, according to the medical evidence, the final chapter of a devastating neurological illness that had been silently ravaging his brain.

What were Robin Williams’ last words and actions before he died?

Who did Robin Williams call before he died?

The last person Robin Williams called was his wife, Susan Schneider. She told investigators that she had left the house that morning and that Williams was still alive when she departed (ABC News (established news outlet)). No recording or transcript of that call exists in the public record, so the precise content remains private.

What did Robin Williams say before he died?

There are no publicly confirmed last words from Williams himself. Despite widespread speculation online, no credible source has produced a direct quote from his final hours. Some reports claim that a phone call to fellow comedian Billy Connolly hinted at a farewell. Billy Connolly later recounted that Williams called him about two weeks before he died and seemed to be saying goodbye in a roundabout way (ABC News (established news outlet)). However, this account is anecdotal and cannot be independently verified.

What this means: the absence of a confirmed final statement leaves a vacuum that speculation fills. The only known fact is that his wife was the last person to speak with him before his death.

Who found Robin Williams after he died?

The timeline of discovery

• August 11, 2014, morning: Susan Schneider leaves their home in Tiburon, California. Williams is last seen alive. (Lewy Body Dementia Association (documentary page))
• 11:45 am PT (approx): Williams’s personal assistant enters the bedroom and finds him unresponsive (Johns Hopkins Medicine (academic medical center))
• 12:00 pm PT: The assistant calls 9-1-1. Emergency responders arrive and pronounce Williams dead at the scene. (Lewy Body Dementia Resource Center (LBD education org))

Official response and investigation

The Marin County Sheriff’s Office handled the case. Because the circumstances were clearly suicide, no criminal investigation was launched. The coroner’s office took possession of the body and performed the autopsy that later revealed the Lewy body dementia (NeurologyAdvisor).

The pattern: the timeline is well-documented and not contested, yet the emotional weight of those hours — what Williams thought and felt — remains unknowable.

What was the real reason behind Robin Williams’ death?

Misdiagnosis of Parkinson’s disease

For much of 2013 and early 2014, Williams was treated for Parkinson’s disease. He had undergone deep brain stimulation surgery and was on medication for the condition (Parkinson’s Foundation (Parkinson’s research & advocacy org)). But the symptoms he reported — paranoia, confusion, insomnia, constipation, lack of balance — were not typical for Parkinson’s alone. His widow, Susan Schneider Williams, later said the symptoms seemed medically puzzling at the time (ABC News (widow interview)).

The role of depression and anxiety

Publicly, Williams’s death was initially framed as a suicide driven by depression. But after the autopsy, his family emphasized that undiagnosed Lewy body dementia likely drove much of the crisis (Lewy Body Dementia Association (LBD advocacy org)). Depression and anxiety can be symptoms of LBD, not just separate mental health issues. The Johns Hopkins Medicine (academic medical center) notes that LBD causes fluctuations in cognition, sleep disturbances, and neuropsychiatric symptoms — all of which Williams reportedly experienced.

The trade-off: the prevailing narrative of depression was simpler and fit public expectations, but the autopsy evidence points to a complex neurological cause that required years of medical hindsight to uncover.

How did other celebrities react to Robin Williams’ death?

What did Ben Affleck say?

Actor Ben Affleck gave a public statement expressing grief over Williams’s death. In an interview, Affleck described Williams as “a brilliant comedian and a kind man” who left an indelible mark on everyone who worked with him (ABC News (established news outlet)). Affleck’s remarks were widely reported but did not contain new factual information about the circumstances of Williams’s death.

Billy Connolly’s perspective

Billy Connolly, a close friend and fellow comedian, shared a story suggesting that Williams tried to say goodbye via a phone call. Connolly said Williams called him about two weeks before he died and seemed to be checking in, but Connolly didn’t realize until later that it might have been a farewell (ABC News (established news outlet)). This account remains unverified but has been repeated in many tribute pieces.

The pattern: celebrity reactions focused on the loss of a talent, but none of them shed light on the medical reality that emerged later. The real story was buried in the pathology report.

Key quotes from those who knew him

“Robin was a brilliant comedian and a kind man. He will be deeply missed.”

— Ben Affleck, in a public statement (via ABC News)

“He called me about two weeks before he died. He was saying goodbye. I didn’t realise it at the time.”

— Billy Connolly, reflecting on his last conversation with Williams (via ABC News)

“It was not depression that killed Robin. It was Lewy body dementia.”

— Susan Schneider Williams, in a public statement about the autopsy findings (via ABC News)

For the public, the tragedy of Robin Williams’s death became a turning point in understanding Lewy body dementia. The condition, which affects an estimated 1.4 million Americans, often goes undiagnosed or misdiagnosed as Parkinson’s or Alzheimer’s (Lewy Body Dementia Association). For families facing similar symptoms, the lesson is clear: push for a thorough neurological evaluation, because the difference between Parkinson’s and LBD can mean years of lost time.

For a detailed account of his final days, the autopsy revealed the extent of his Lewy body dementia.

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